Drum-based printers using multiple pens per color

A printer system comprising:

• a drum for carrying print medium, the drum being rotatable about an axis to advance the medium in a first direction;
• a first and second carriage component mounted near the drum, each carriage component and including two bays, each bay for receiving an ink pen that has an associated print swath, wherein the bays are arranged so that when pens are received therein the printed swaths of the two pens of one carriage component are adjacent one another in a direction parallel to the axis of the drum;
• and
• wherein the bays are arranged so that the two pens of the first carriage component are aligned in the first direction with the two pens of the second carriage component, so that the two pens of the second carriage component print over the swath printed by the two pens of the first carriage component.

A carriage for an inkjet printer, comprising

• a frame mounted in the printer;
• a first carriage component mounted to the frame and having walls that define two bays into each of which is inserted an inkjet pen, wherein the first carriage component is molded, and wherein an inkjet pen that is inserted into one bay is carried at an angle relative to another pen that is inserted into the other bay;
• and
• wherein the bays of the first carriage component include features thereon for controlling the location of the inkjet pens that are inserted into the bays, the features being molded without mold motion other than opening and shutting of the mold.